IQuery ProcessFunction(Function root, IQuery qyInput)
{
IQuery qy = null;
switch (root.TypeOfFunction)
{
case FT.FuncPosition:
qy = new MethodOperand(null, root.TypeOfFunction);
return(qy);
// we should be able to count how many attributes
case FT.FuncCount:
qy = ProcessNode((AstNode)(root.ArgumentList[0]), null);
if (qy is AttributeQuery)
{
return(new MethodOperand(qy, FT.FuncCount));
}
//none attribute count funciton result in error.
break;
case FT.FuncLocalName:
case FT.FuncNameSpaceUri:
case FT.FuncName:
if (root.ArgumentList != null && root.ArgumentList.Count > 0)
{
return(new MethodOperand(ProcessNode((AstNode)(root.ArgumentList[0]), null),
root.TypeOfFunction));
}
else
{
return(new MethodOperand(null, root.TypeOfFunction));
}
case FT.FuncString:
case FT.FuncConcat:
case FT.FuncStartsWith:
case FT.FuncContains:
case FT.FuncSubstringBefore:
case FT.FuncSubstringAfter:
case FT.FuncSubstring:
case FT.FuncStringLength:
case FT.FuncNormalize:
case FT.FuncTranslate:
ArrayList ArgList = null;
if (root.ArgumentList != null)
{
int count = 0;
ArgList = new ArrayList();
while (count < root.ArgumentList.Count)
{
ArgList.Add(ProcessNode((AstNode)root.ArgumentList[count++], null));
}
}
return(new StringFunctions(ArgList, root.TypeOfFunction));
case FT.FuncNumber:
//case FT.FuncSum:
case FT.FuncFloor:
case FT.FuncCeiling:
case FT.FuncRound:
if (root.ArgumentList != null)
{
return(new NumberFunctions(ProcessNode((AstNode)root.ArgumentList[0], null),
root.TypeOfFunction));
}
else
{
return(new NumberFunctions(null));
}
case FT.FuncTrue:
case FT.FuncFalse:
return(new BooleanFunctions(null, root.TypeOfFunction));
case FT.FuncNot:
case FT.FuncLang:
case FT.FuncBoolean:
return(new BooleanFunctions(ProcessNode((AstNode)root.ArgumentList[0], null),
root.TypeOfFunction));
// Unsupport functions
case FT.FuncID:
// Last Function is not supported, because we don't know
// how many we get in the list
// <Root> <e a="1"/> <e a="2"/></Root>
// /Root/e[last()=2]
// we will not return the first one because
// we don't if we have two e elements.
case FT.FuncLast:
//qy = new MethodOperand(null, root.TypeOfFunction);
//return qy;
default:
throw new XPathReaderException("The XPath query is not supported.");
}
return(null);
}
IQuery ProcessFunction(Function root, IQuery qyInput) {
IQuery qy = null;
switch (root.TypeOfFunction) {
case FT.FuncPosition :
qy = new MethodOperand(null, root.TypeOfFunction);
return qy;
// we should be able to count how many attributes
case FT.FuncCount :
qy = ProcessNode((AstNode)(root.ArgumentList[0]), null);
if (qy is AttributeQuery) {
return new MethodOperand(qy, FT.FuncCount);
}
//none attribute count funciton result in error.
break;
case FT.FuncLocalName :
case FT.FuncNameSpaceUri :
case FT.FuncName :
if (root.ArgumentList != null && root.ArgumentList.Count > 0) {
return new MethodOperand( ProcessNode((AstNode)(root.ArgumentList[0]),null),
root.TypeOfFunction);
} else{
return new MethodOperand(null, root.TypeOfFunction);
}
case FT.FuncString:
case FT.FuncConcat:
case FT.FuncStartsWith:
case FT.FuncContains:
case FT.FuncSubstringBefore:
case FT.FuncSubstringAfter:
case FT.FuncSubstring:
case FT.FuncStringLength:
case FT.FuncNormalize:
case FT.FuncTranslate:
ArrayList ArgList = null;
if (root.ArgumentList != null) {
int count = 0;
ArgList = new ArrayList();
while (count < root.ArgumentList.Count)
ArgList.Add(ProcessNode((AstNode)root.ArgumentList[count++], null));
}
return new StringFunctions(ArgList, root.TypeOfFunction);
case FT.FuncNumber:
//case FT.FuncSum:
case FT.FuncFloor:
case FT.FuncCeiling:
case FT.FuncRound:
if (root.ArgumentList != null) {
return new NumberFunctions(ProcessNode((AstNode)root.ArgumentList[0], null),
root.TypeOfFunction);
} else {
return new NumberFunctions(null);
}
case FT.FuncTrue:
case FT.FuncFalse:
return new BooleanFunctions(null, root.TypeOfFunction);
case FT.FuncNot:
case FT.FuncLang:
case FT.FuncBoolean:
return new BooleanFunctions(ProcessNode((AstNode)root.ArgumentList[0], null),
root.TypeOfFunction);
// Unsupport functions
case FT.FuncID :
// Last Function is not supported, because we don't know
// how many we get in the list
// <Root> <e a="1"/> <e a="2"/></Root>
// /Root/e[last()=2]
// we will not return the first one because
// we don't if we have two e elements.
case FT.FuncLast :
//qy = new MethodOperand(null, root.TypeOfFunction);
//return qy;
default :
throw new XPathReaderException("The XPath query is not supported.");
}
return null;
}